Android 如何添加通知计时器，如whatsapp呼叫通知？

我有一个通知生成器。我想添加通知计时器，如whatsapp调用通知。所以如果我调用updateNotifTime函数，它就不起作用了

NotificationCompat.Builder builder = new NotificationCompat.Builder(context, callChannelId)
                .setSmallIcon(R.drawable.call_icon)
                .setContentIntent(pendingIntent)
                .setOngoing(true)
                .setShowWhen(true)
                .setWhen(System.currentTimeMillis())
                .setPriority(NotificationCompat.PRIORITY_HIGH);

public void updateNotifTime() {
    this.callingElapsedRunnable = new Runnable() {
                @Override
                public void run() {

                    elapsedTime += 1000;

                    String timer = DateUtils.calculateTime(elapsedTime);

                    builder.setWhen(elapsedTime);

                    callingElapsedHandler.postDelayed(this, 1000);
                }
            };

callingElapsedHandler.postDelayed(callingElapsedRunnable, 1000);
    }

---

我为添加了自定义布局，我用一种非常简单的方法解决了这个问题。 我最初的通知

notification = new NotificationCompat.Builder(this, CALL_CHANNEL_ID)
            .setContentText("Incoming Voice Call")
            .setContentTitle(getDoctor().name)
            .setSmallIcon(R.drawable.ic_baseline_call_received_24)
            .setPriority(NotificationCompat.PRIORITY_HIGH)
            .setCategory(NotificationCompat.CATEGORY_CALL)
            .setShowWhen(true)
            .setUsesChronometer(true)
            .setFullScreenIntent(voicePendingIntent, true);
    startForeground(1, notification.build());

存储服务启动时的时间戳

    public void startTimer() {
    if (!isTimerRunning) {
        startTime = System.currentTimeMillis();
        isTimerRunning = true;
    } else {
        Log.e(TAG, "startTimer request for an already running timer");
    }
}

每次调用elapsedTime（），（通常在获取时间的活动中）通知都会更新

    public long elapsedTime() {
    if (isTimerRunning()) {
        durationMillis = System.currentTimeMillis() - startTime;
        notification.setWhen(startTime);
        notification.setOnlyAlertOnce(true);
        notificationManager.notify(1, notification.build());
        return (durationMillis);
    } else {
        return 0;
    }
}

---

尝试使用：.setUsesChronometer（true）提示：我尝试过这个，但仍然不起作用：（哦，你能尝试并行使用吗：setChronometerCountDown（布尔）setChronometerCountDown（布尔）未定义

。setChronometerCountDown（true）

我已经使用了这个代码，但是我仍然收到了

错误的通知

你想要通知计时器吗？是的，和什么应用程序调用一样。谢谢，它现在工作了。当用户点击那个通知时，我能得到那个时间吗？是的，你可以收听那个点击的通知。

private void sendNotification(String from, String messageText) {
    Intent intent = new Intent(this, MainActivity.class);
    intent.addFlags(Intent.FLAG_ACTIVITY_CLEAR_TOP);
    PendingIntent pendingIntent = PendingIntent.getActivity(this, 0, intent, PendingIntent.FLAG_ONE_SHOT);
    Uri defaultSoundUri= RingtoneManager.getDefaultUri(RingtoneManager.TYPE_NOTIFICATION);
    NotificationCompat.Builder notificationBuilder = new NotificationCompat.Builder(this)
            .setSmallIcon(R.mipmap.ic_launcher)
            .setContentTitle(from)
            .setContentText(messageText)
            .setAutoCancel(true)
            .setSound(defaultSoundUri)
            .setContentIntent(pendingIntent);
    NotificationManager notificationManager = (NotificationManager) getSystemService(Context.NOTIFICATION_SERVICE);
    notificationManager.notify(0, notificationBuilder.build());
}

notification = new NotificationCompat.Builder(this, CALL_CHANNEL_ID)
            .setContentText("Incoming Voice Call")
            .setContentTitle(getDoctor().name)
            .setSmallIcon(R.drawable.ic_baseline_call_received_24)
            .setPriority(NotificationCompat.PRIORITY_HIGH)
            .setCategory(NotificationCompat.CATEGORY_CALL)
            .setShowWhen(true)
            .setUsesChronometer(true)
            .setFullScreenIntent(voicePendingIntent, true);
    startForeground(1, notification.build());

    public void startTimer() {
    if (!isTimerRunning) {
        startTime = System.currentTimeMillis();
        isTimerRunning = true;
    } else {
        Log.e(TAG, "startTimer request for an already running timer");
    }
}

    public long elapsedTime() {
    if (isTimerRunning()) {
        durationMillis = System.currentTimeMillis() - startTime;
        notification.setWhen(startTime);
        notification.setOnlyAlertOnce(true);
        notificationManager.notify(1, notification.build());
        return (durationMillis);
    } else {
        return 0;
    }
}